No, I don't bother either. I bought one and used it for 2 weeks or so, to get a (somewhat) accurate milage count (everyday was different on the same route since it gave me 1/1000 of a mile). It gave me a general idea on how fast I was going, and then I lost interest. Towards the end, I felt myself kinda stressing out about avg speed etc, and that's when I got rid of it.